| 金属陶瓷惰性阳极压坯的热脱脂工艺 |
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| 引用本文： | 刘建元,张雷,李志友,周科朝.金属陶瓷惰性阳极压坯的热脱脂工艺[J].中南大学学报(自然科学版),2008,39(5). |
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| 作者姓名： | 刘建元 张雷 李志友 周科朝 |
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| 作者单位： | 中南大学,粉末冶金国家重点实验室,湖南,长沙,410083 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，湖南省科技计划，中南大学校科研和教改项目 |
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| 摘 要： | 以聚乙烯醇(PVA)和NiFe2O4/Ni型金属陶瓷压坯为对象,采用热重分析(TGA)研究PVA在N2气氛中的热脱脂行为,建立PVA热脱脂速率的数学模型,在此基础上,模拟并计算PVA分解产物气体在多孔粉末压坯内的压力构建情况;结合粉末压坯脱脂强度测试结果,分析粉末压坯在脱脂过程中压坯尺寸、粘结剂含量等因素对升温速率和脱脂时间的影响,获得不同半径尺寸压坯的极限升温速率.运用所得方法和所得极限升温速率结果进行脱脂实验升温制度设计,实现了压坯直径D＝0.12 m,压坯厚度e＝0.12 m的NiFe2O4/Ni惰性阳极大型压坯的无缺陷热脱脂.
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| 关 键 词： | 惰性阳极 热脱脂 极限升温速率 |
Thermal debinder technology for cermet compacts of inert anode |
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| LIU Jian-yuan,ZHANG Lei,LI Zhi-you,ZHOU Ke-chao.Thermal debinder technology for cermet compacts of inert anode[J].Journal of Central South University:Science and Technology,2008,39(5). |
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| Authors: | LIU Jian-yuan ZHANG Lei LI Zhi-you ZHOU Ke-chao |
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| Institution: | LIU Jian-yuan,ZHANG Lei,LI Zhi-you,ZHOU Ke-chao(State Key Laboratory for Powder Metallurgy,Central South University,Changsha 410083,China) |
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| Abstract: | For developing non-defects large scale NiFe2O4/Ni cermet compacts of inert anode for the primary aluminium industry,the thermo-gravimetric analysis was used to determine the thermal degradation kinetic of poly(vinyl alcohol) which was used as a binder.The kinetic parameters were then used in a coupled transport and kinetic model for evaluating the buildup of the gas pressure within the large scale ceramic green body as a function of variations of the heating rate and the body dimension.The critical heating ... |
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| Keywords: | PVA NiFe2O4/Ni |
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